Originally posted by Rhapsody:

How tall exactly is a single "story" or "floor"? Height of a regular wooden wall piece?

a viking can function in a 2m tall room. But not all the furniture or crafting stuff fits that low. 3m is more standard, as 2m is almost head bumping and just too tight and funky camera behaviors. for stone floors, that means 3.5m to account for the thick floors.